.input-invalid {
    border: 2px solid red !important;
}

button[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
    background-color: #cccccc;
    color: #666666;
    border: 1px solid #999999;
}

#calcular{
    margin-top: 50px;
}

.email-message-error {
    color: red;
}

.email-message-pending {
    color: orange;
}